AEM workflows: What kind of step/object can I use to notify requester their request was denied/approved?

as a guide, I was following this one: Creating Workflow Models

There's an example somewhere in the page where a yes/no decision (to approve page publication) can be made. If No is selected, it goes to a participant step.

I'm new to workflows but what I really want:

1. If no is selected, an email/notification is sent to the requester that their request was denied

2. If yes was selected, an email/notification to the requester that their request has been approved.

I've looked at the available workflow steps/objects in the picker/sidekick and nothing stands out to do what I want.

Thanks